This app has four Bluetooth features. They are joypad, switch, dimmer and terminal. When you run the app, you will see the paired Bluetooth devices. The devices are you want to connect to must pair with your smartphone first. It has also virtual Bluetooth and you can use the app without a Bluetooth device. Joypad can be customized using the key settings. Dimming controller is generally available in number 0 through 9, but If with the Hexabyte setting, you can control from 0 to 100 in more detail.